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March 6th 06, 09:32 PM
posted to rec.radio.shortwave
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IBOC Article
On Mon, 06 Mar 2006 20:23:00 GMT, Telamon
wrote: This is a simple concept that many people don't seem to get. Information rate directly correlates to bandwidth in this way, higher rate and more detail means larger bandwidth. Analog or digital is just a method of encoding information. Narrow filtered analog is similar to low rate digital. It does not matter what digital method you use you can't get around the fact that a better picture or audio means you need to use more bandwidth. There is more then one way to encode the analog world into digital and back and some methods are more efficient then others but there is no magic digital encoding system comprised of one or a combination of encoding methods that will magically stuff more information into the same bandwidth. The DRM controversy has gone on for a long time where the claim that DRM sounds better then analog in the same bandwidth. This is a bunch of BS. Not only does this violate the laws of physics it further makes less sense from the standpoint of conversion of analog to digital at the transmit end and then digital back to analog at the receive end. Technically changing from analog to digital and back introduces conversion errors so DRM in the same bandwidth has to sound worse than analog. The only way DRM can sound better is to use more bandwidth than analog. So there are are two basic concepts for anyone reading the news group. DRM and IBOC claims are a bunch of BS. Analog or any digital system will sound better the more bandwidth you use. Ever hear of quadrature? |
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